Load menus from packages

src/atom-package.coffee

@@ -92,6 +92,7 @@ class AtomPackage extends Package
   activateResources: ->
     keymap.add(keymapPath, map) for [keymapPath, map] in @keymaps
     atom.contextMenu.add(menuPath, map['context-menu']) for [menuPath, map] in @menus
+    atom.menu.add(map.menu) for [menuPath, map] in @menus when map.menu
     syntax.addGrammar(grammar) for grammar in @grammars
     for [scopedPropertiesPath, selector, properties] in @scopedProperties
       syntax.addProperties(scopedPropertiesPath, selector, properties)

src/menu-manager.coffee

@@ -24,8 +24,8 @@ class MenuManager
   #   https://github.com/atom/atom-shell/blob/master/docs/api/browser/menu.md
   #
   # Returns nothing.
-  add: (item) ->
-    @merge(@template, item)
+  add: (items) ->
+    @merge(@template, item) for item in items
 
   # Public: Refreshes the currently visible menu.
   update: ->
@@ -36,7 +36,7 @@ class MenuManager
     menuPaths = fsUtils.listSync(atom.config.bundledMenusDirPath, ['cson', 'json'])
     for menuPath in menuPaths
       data = CSON.readFileSync(menuPath)
-      @add(item) for item in data.menu
+      @add(data.menu)
 
   # Private: Merges an item in a menu aware way such that new items are always
   # appended to the bottom.